Investments in Real Estate- Gain on Sales of Real Estate (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($) property	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($) property
Properties sold during the period
Number of properties | property	24	35	79	139
Net sales proceeds	$ 32.3	$ 142.4	$ 92.8	$ 414.7
Gain on sales of real estate	$ 7.6	$ 42.9	$ 19.7	$ 93.6